The University of Dublin | Trinity College -- Ollscoil Átha Cliath | Coláiste na Tríonóide
Trinity's Access to Research Archive
Home :: Log In :: Submit :: Alerts ::

TARA >
School of Natural Science >
Botany >
Botany (Scholarly Publications) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/62561

Title: An agronomic assessment of greenhouse gas emissions from major cereal crops
Author: VAN GROENIGEN, CORNELIS JAN
Sponsor: European Commission
Author's Homepage: http://people.tcd.ie/vangroec
Keywords: Environmental Science
Climate change
Issue Date: 2012
Citation: Linquist B, Van Groenigen KJ, Adviento-Borbe A, Pittelkow C, Van Kessel C, An agronomic assessment of greenhouse gas emissions from major cereal crops, Global Change Biology, 18, 2012, 194 - 209
Series/Report no.: Global Change Biology;
18;
Abstract: Agricultural greenhouse gas (GHG) emissions contribute approximately 12% to total global anthropogenic GHG emissions. Cereals (rice, wheat, and maize) are the largest source of human calories, and it is estimated that world cereal production must increase by 1.3% annually to 2025 to meet growing demand. Sustainable intensification of cereal production systems will require maintaining high yields while reducing environmental costs. We conducted a meta-analysis (57 published studies consisting of 62 study sites and 328 observations) to test the hypothesis that the global warming potential (GWP) of CH4 and N2O emissions from rice, wheat, and maize, when expressed per ton of grain (yield-scaled GWP), is similar, and that the lowest value for each cereal is achieved at near optimal yields. Results show that the GWP of CH4 and N2O emissions from rice (3757 kg CO2 eq ha-1 season-1) was higher than wheat (662 kg CO2 eq ha-1 season-1) and maize (1399 kg CO2 eq ha-1 season-1). The yield-scaled GWP of rice was about four times higher (657 kg CO2 eq Mg-1) than wheat (166 kg CO2 eq Mg-1) and maize (185 kg CO2 eq Mg-1). Across cereals, the lowest yield-scaled GWP values were achieved at 92% of maximal yield and were about twice as high for rice (279 kg CO2 eq Mg-1) than wheat (102 kg CO2 eq Mg-1) or maize (140 kg CO2 eq Mg-1), suggesting greater mitigation opportunities for rice systems. In rice, wheat and maize, 0.68%, 1.21%, and 1.06% of N applied was emitted as N2O, respectively. In rice systems, there was no correlation between CH4 emissions and N rate. In addition, when evaluating issues related to food security and environmental sustainability, other factors including cultural significance, the provisioning of ecosystem services, and human health and well-being must also be considered.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/62561
Related links: http://dx.doi.org/10.1111/j.1365-2486.2011.02502.x
Appears in Collections:Botany (Scholarly Publications)

Files in This Item:

File Description SizeFormat
An agronomic assessment of greenhouse gas emissions from major cereal crops.pdfPublished (publisher's copy) - Peer Reviewed193.65 kBAdobe PDFView/Open


This item is protected by original copyright


Please note: There is a known bug in some browsers that causes an error when a user tries to view large pdf file within the browser window. If you receive the message "The file is damaged and could not be repaired", please try one of the solutions linked below based on the browser you are using.

Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback